Pressure-gage



C. B HALE PRESSURE GAGE- APPLICATION FlLED-MAY 20. me.

1,330,466. Patented Feb.-10,192 0.

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CHARLES BALLABD HALE, or rear: nines, ILLINOIS, 'assisiqoit T0TIME-SYSTEMS 0 IDE'IFRQI'I,v MIGHIGfLN, A CORPORATION (1E MICHIGAN.

PRESSURE-GAGE.

T 0 all whom it may concern:

Be it known that I, CHARLES BALLARD Hanna citizen of the United States,residingrat Park Ridge, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Pressure- Gages, ofwhich the followin is a specification.

This invention relates to new and useful improvements in pressure gagesand has for its object the construction of a gage which will measure thepressure of impulses of air passed through a line pipe and which may bereadily shipped attachedto its cooperating apparatus without beingdamaged or broken.

vVith the above and other objects in view,

' vention;

Fig. 2 is a central vertical section taken along line 22 of Fig. 1;

Fig. 8 is a similar view taken along line 3-3 of Fig. 2;

Fig 4 is a horizontal section taken along line 4l41 of Fig. 1, and iFig. 5 is likewise a horizontal section taken along line 55 of 1.

In carrying out the present invention, a tubular shell or casing isprovided having an elongated sight opening therein. A head is insertedin the upper end of the shell or casing and has sockets therein in whichare received the ends of a U tube; one of said sockets connecting withthe atmosphere while the other communicates with the source of pressure.Within the U tube is a column of colored liquid, in each-0f the branchesthereof, which balance when ati iospheric pressure prevails in bothbranches; but which becomes unbalanced when an impulse of pressure or aconstant pressure emanates from the source thereof, causing the columnof liquid in the branch communicating with the atmosphere to rise whilethe other column becomes lower.

Referring more particularly to the drawing 10 designates a shell orcasing, tubular in its formation, and cut away to form the elongatedsight opening 11, through the we Specification of Letters Patent.

Patented Feb. 10,1920.

Application filed tra .20, 191 Serial No. 9e,7e5.-

dium of which the gage may be read. In producing the casing or shell 10the stock from which it is formed, out or otherwise taken, is so outthat a heavy inwardly 6X- tending bur 12 is formed at one end of saidshell or casing, the utility of which will be hereinafter apparent.

Oppositely disposed to the end of the shell or casing 10 having the bur12, is a head 13, fitted snugly but removably in thecooperao ing end ofsaid shell or casing and having an outstanding, faced shoulder 14:formed thereon, which rests upon the upper end of the shell or casingwhen the head is located therein. A nipple 15 projects centrally fromthe head 13, and constitutes the" connection betweenthe pipe 16 and thegage. The head 13 is held within the end of the shell or casing 10byineans of screws 17 passing through "openings in said shell or casingand threaded into the head 13, as illustrated in Fig.2.

The inner end of the head 13 has a pair of independent sockets, 18 and19, respectively, formed thereimfor the reception of the ends of thebranches 20 and 20 of the U tube 20, said ends sealed oranchored in thesaid sockets by a plastic compound of litharge and glycerin beingallowed to set around said ends against the inner terminal of the head13 as at 21. It is of'course understood that other sealing compounds maybe readily- I,

used without departing from the spirit and scope hereof. The socket 18,in which'is seated the end of the branch 20 of the U tube 20 terminatesin a passage 22, leading to and communicating with the nipple 15;- whilethe socket 19, in which is seatedthe branch 20 of the U tube 20,terminates in the transverse passage 23 which extends to For the purposeof indicating such pressure, the U tube is partially filled with anysuitable colored liquid whereby a column of said liquid is located ineach branch 20 and 20 thereof. When conditions are such that atmosphericpressure prevails in the pipe 16 the columns of liquid, in thebranches20z and 20 balance, or maintain the same level, as isillustrated in the various views of the drawing.- If, however, pressureexists in pipe 16 the columns of liquid will assume different levels 2'.e. the column in the branch 20 rising while the column in the branch 20becomes lower. Sub-atmospheric conditions in the pipe 16 cause areversal of the levels of the columns of liquid in that the column inthe branch 20 rises while the other column in the branch 20 seeks alower level.

The bend of the U tubeQO is embedded in the cotton or other likematerial 2 to prevent damage to this tube, the material 24 absorbing allshocks, jars, etc., which otherwise would be damaging to the tube 20.This cotton 24 is held in place by the plaster of Paris or similarsubstance 25 set in the burred end of the shell or casing 10. As the bur12 becomes embedded in the plaster of Paris 25, it holds the same inplace as well as forms a protection therefor.

What is claimed is:

1. In a pressure gage, the combination with a casing, of a headsecuredin one end thereof provided with a plurality of parallelsocketsin its inner end, one of said sockets being connected to the exterior ofsaid head by means of a lateral passage communicating with the inner endof said socket, a nipple on the outer end of said head connected by apassage with the other of said sockets, a U-tube having the freeterminals of its arms mounted within the sockets afore said, an inwardlyextending bur at the op posite end of said casing, a fabricated packingsurrounding the bend in said tube, and a plastic material sealing theend of the tube havingthe bur, said bur being embedded in said plasticmaterial.

2. The "combination with a shell or casing having a sight openingtherein, of a single continuous U-tube so'mounted in said casing thatboth arms thereof are visible through said sight opening, a head in oneend of said casing, having a pairof sockets therein, one for thereception of'the free end of one arm of said U tube, and a lateralpassage therein forming a means of communication between one of saidsockets and the atmosphere, a nipple carried by said head'andcommunicating with the remaining socket for connecting it to a source ofpressure, an inwardly extending bur formed from said shell or casing atthe end thereof adjoining the elbow in the U tube, and a seal held insaid shell or casing by the bur aforesaid 3. The combination with ashell or casing having a sight opening therein, of a single continuousU-tube so mounted in said casing that both arms thereof are visiblethrough said sight opening, a head in one end of said casing, having apair of sockets therein, one for the reception of the free end of onearm of said U-tube, and a lateral passage therein forming a means ofcommunication between one of said sockets and the atmos-' phere, anipple carried by said head and communicating with the remaining socketfor connecting it to a source of pressure, an inwardly extending burformed from said shell or casing at the 'end thereof adjoining the elbowin the U-tube, a seal normally flush with the end of the casing andhaving said bur embedded therein, and liquid in' said U-tube forming acolumn in each arm thereof, said columns being normally balanced untilthe admission of pressure to one arm of the U-tube through the'nippleaforesaid.

- CHARLES BALLARD HALE.

